Patent US6454826B2 successfully refreshed from Google Patents.
US6454826B2
Expired / Lapsed
US
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Filter cartridge
Assignee: Carl Freudenberg KG
•
Filing: 2001-03-16
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Granted: 2002-09-24
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Expires: 2021-03-16
Abstract
Abstract A filter cartridge is made of an accordion fold pack folded in a zigzag-shape. At the end faces ( 4 ) of the accordion fold pack, running parallel to the folds, provision is made for the closing elements ( 5 ) which include stiffening strips ( 6 ), partially covering the accordion fold pack ( 2 ), at least on its discharge side, and sealing elements ( 7 ) integrally connected to the stiffening strips ( 6 ).
Inventors
- 👤 Jürgen Fath
- 👤 Dieter Schöttmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:40
CPC Classifications
B; B01; B01D; B01D39/00; B01D46/00; B01D46/52; B01D46/521; B01D46/10; B01D2265/00; B01D2265/04; B01D2271/00; B01D2271/02; B01D2279/00; B01D2279/50; Y; Y10; Y10S; Y10S55/00; Y10S55/31
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
83 words
A filter cartridge comprising: an accordion fold pack folded in a zigzag shape, the accordion fold pack having end faces running parallel to the folds, closing elements which include stiffening strips partially covering the accordion fold pack and attached to a plurality of the end faces, at least on a discharge side of the fold pack, and sealing elements comprising sealing flaps integrally connected to the stiffening strips, the end faces of the accordion fold pack being adapted to receive the closing elements.
Claim 2
Dependent Claim
83 words
A filter cartridge comprising: an accordion fold pack folded in a zigzag shape, the accordion fold pack having end faces running parallel to the folds, closing elements which include stiffening strips partially covering the accordion fold pack and attached to a plurality of the end faces, at least on a discharge side of the fold pack, and sealing elements comprising sealing flaps integrally connected to the stiffening strips, the end faces of the accordion fold pack being adapted to receive the closing elements.
Claim 3
Dependent Claim
79 words
A filter cartridge comprising: an accordion fold pack folded in a zigzag shape, the accordion fold pack having end faces running parallel to the folds, closing elements which include stiffening strips partially covering the accordion fold pack, at least on a discharge side of the fold pack, and sealing elements integrally connected to the stiffening strips, the end faces of the accordion fold pack being adapted to receive the closing elements, wherein the stiffening strips have a sawtooth-shaped form.
Claim 4
Dependent Claim
79 words
A filter cartridge comprising: an accordion fold pack folded in a zigzag shape, the accordion fold pack having end faces running parallel to the folds, closing elements which include stiffening strips partially covering the accordion fold pack, at least on a discharge side of the fold pack, and sealing elements integrally connected to the stiffening strips, the end faces of the accordion fold pack being adapted to receive the closing elements, wherein the stiffening strips have a sawtooth-shaped form.
Claim 5
Dependent Claim
77 words
A filter cartridge comprising: an accordion fold pack folded in a zigzag shape, the accordion fold pack having end faces running parallel to the folds, closing elements which include stiffening strips partially covering the accordion fold pack, at least on a discharge side of the fold pack, and sealing elements integrally connected to the stiffening strips, the end faces of the accordion fold pack being adapted to receive the closing elements, wherein the stiffening strips are perforated.
Claim 6
Dependent Claim
77 words
A filter cartridge comprising: an accordion fold pack folded in a zigzag shape, the accordion fold pack having end faces running parallel to the folds, closing elements which include stiffening strips partially covering the accordion fold pack, at least on a discharge side of the fold pack, and sealing elements integrally connected to the stiffening strips, the end faces of the accordion fold pack being adapted to receive the closing elements, wherein the stiffening strips are perforated.
Claim 7
Dependent Claim
26 words
The filter cartridge as recited in claim 1 , wherein the sealing elements comprise sealing flaps directed toward an intake side of the accordion fold pack.
Claim 8
Dependent Claim
101 words
A filter cartridge comprising: an accordion fold pack folded in a zigzag shape, the accordion fold pack having end faces running parallel to the folds, closing elements which include stiffening strips partially covering the accordion fold pack, at least on a discharge side of the fold pack, and sealing elements integrally connected to the stiffening strips, the end faces of the accordion fold pack being adapted to receive the closing elements, wherein the sealing elements comprise sealing flaps directed toward an intake side of the accordion fold pack and the sealing flaps are bent convexly or concavely in their longitudinal direction.
Claim 9
Dependent Claim
101 words
A filter cartridge comprising: an accordion fold pack folded in a zigzag shape, the accordion fold pack having end faces running parallel to the folds, closing elements which include stiffening strips partially covering the accordion fold pack, at least on a discharge side of the fold pack, and sealing elements integrally connected to the stiffening strips, the end faces of the accordion fold pack being adapted to receive the closing elements, wherein the sealing elements comprise sealing flaps directed toward an intake side of the accordion fold pack and the sealing flaps are bent convexly or concavely in their longitudinal direction.
Claim 10
Dependent Claim
31 words
The filter cartridge as recited in claim 4 , wherein a height of the sealing flaps is at least 10% of a height of the folds of the accordion fold pack.
Claim 11
Dependent Claim
79 words
A filter cartridge comprising: an accordion fold pack folded in a zigzag shape, the accordion fold pack having end faces running parallel to the folds, closing elements which include stiffening strips partially covering the accordion fold pack, at least on a discharge side of the fold pack, and sealing elements integrally connected to the stiffening strips, the end faces of the accordion fold pack being adapted to receive the closing elements, wherein the sealing elements have a hose-shaped design.
Claim 12
Dependent Claim
79 words
A filter cartridge comprising: an accordion fold pack folded in a zigzag shape, the accordion fold pack having end faces running parallel to the folds, closing elements which include stiffening strips partially covering the accordion fold pack, at least on a discharge side of the fold pack, and sealing elements integrally connected to the stiffening strips, the end faces of the accordion fold pack being adapted to receive the closing elements, wherein the sealing elements have a hose-shaped design.
Claim 13
Dependent Claim
32 words
The filter cartridge as recited in claim 7 , wherein the sealing elements are made of a slitted, hose-shaped roll, each of the slit edges having a stiffening strip connected to it.
Claim 14
Dependent Claim
105 words
A filter cartridge comprising: an accordion fold pack folded in a zigzag shape, the accordion fold pack having end faces running parallel to the folds, closing elements which include stiffening strips partially covering the accordion fold pack, at least on a discharge side of the fold pack, and sealing elements integrally connected to the stiffening strips, the end faces of the accordion fold pack being adapted to receive the closing elements, wherein the sealing elements have a U-shaped form and are connected with their free edges to the stiffening strips, each of the stiffening strips being positioned on one side of the accordion fold pack.
Claim 15
Dependent Claim
105 words
A filter cartridge comprising: an accordion fold pack folded in a zigzag shape, the accordion fold pack having end faces running parallel to the folds, closing elements which include stiffening strips partially covering the accordion fold pack, at least on a discharge side of the fold pack, and sealing elements integrally connected to the stiffening strips, the end faces of the accordion fold pack being adapted to receive the closing elements, wherein the sealing elements have a U-shaped form and are connected with their free edges to the stiffening strips, each of the stiffening strips being positioned on one side of the accordion fold pack.
Claim 16
Dependent Claim
36 words
The filter cartridge as recited in claim 1 , wherein the stiffening strips and the sealing elements have a different strength and material density. strips and the sealing elements have a different strength and/or material density.
Claim 17
Dependent Claim
22 words
The filter cartridge as recited in claim 1 , wherein the stiffening strips and the sealing elements are made of different materials.
Claim 18
Dependent Claim
19 words
The filter cartridge as recited in claim 11 , wherein one of the different materials is a nonwoven fabric.
Claim 19
Dependent Claim
18 words
The filter cartridge as recited in claim 11 , wherein one of the different materials is a thermoplastic.
Claim 20
Dependent Claim
26 words
The filter cartridge as recited in claim 1 , wherein the stiffening strips and the sealing elements are connected to each other via a bending fold.
Claim 21
Dependent Claim
24 words
The filter cartridge as recited in claim 1 , wherein the stiffening strips and the sealing elements have a different strength or material density.
Claim 22
Dependent Claim
14 words
The filter cartridge as recited in claim 1 , wherein the sealing flaps each
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-09-23 | 2006-03-25 | 2006-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-09-23 | 2010-03-25 | 2010-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-09-23 | 2014-03-25 | 2014-09-24 | $7700.00 | Window Closed / Lapsed |